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Security audit

Word Count

Security checks for vulnerabilities and agentic risk

Overview

This is a simple word-counting skill with minor documentation/output mismatches but no hidden access, persistence, network use, or destructive behavior.

Before installing, understand that this skill reads the file path you provide and reports counts; expect byte counts rather than true Unicode character counts unless the publisher updates the documentation or implementation.

A.I.G

Vulnerability Patterns
  • Skill Instruction HijackingAlters the agent's session goals or safety constraints when the skill loads
  • Agent Memory PoisoningWrites attacker-controlled rules into memory that affect later sessions
  • Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
  • Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs

SkillSpector

Vulnerability Patterns
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (4)

Tp4

High
Category
MCP Tool Poisoning
Confidence
97% confidence
Finding

The code is broadly related to file counting, but it does not accurately match the declared behavior. The description says it outputs a single summary line, while the script emits five separate labeled lines. It also claims to count characters, but uses wc -c, which reports bytes rather than true character count. Additionally, it prints the file path and a status line, which are undeclared output behaviors. These are material description-versus-behavior mismatches, even though the overall domain purpose is similar.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
82% confidence
Finding

The manual explicitly provides English and Korean sections, but there is no language-selection guidance or statement that these are optional/localized variants. Under the policy rule, locale handling should either offer user choice explicitly or document why a locale constraint exists; here the document presents fixed languages without that clarification.

Content

No source excerpt is available for this finding.

Intent-Code Divergence

Low
Category
Not specified by scanner
Confidence
91% confidence
Finding

The comments describe counting and outputting 'characters,' but the code uses 'wc -c' and labels the result as 'BYTES'. For many inputs these differ, so the documentation's stated behavior contradicts the actual metric being reported.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

Low
Category
Not specified by scanner
Confidence
98% confidence
Finding

The manifest says the skill 'Outputs a single summary line,' but the implementation emits separate lines for file name, line count, word count, byte count, and status. This is a direct behavior mismatch in the user-visible output format, even though the core counting purpose is implemented correctly.

Content

No source excerpt is available for this finding.